d=document
 d.l=d.layers
 d.a=d.all
 d.g=d.getElementById

// pobranie elementu po identyf 
function getEl(id){
        with(d)var e=g?g(id):a?a[id]:l[id];
        if(!e.style)e.style=e;
        return e }

// Pokaz blok 'ident'   
function show(ident,nest) {
  if(d.l) {  
    nest ? document.layers[nest].document.layers[ident].visibility = "show" : document.layers[ident].visibility = "show";
  } else if(d.a) {  
    document.all[ident].style.visibility = "visible";
  } else if(d.g && !d.a) {
    warstwa =document.getElementById(ident);
    warstwa.style.visibility = "visible";
 }
}

// Pokaz blok z zajeciem miejsca'ident'   
function showdisplay(ident,nest) {
  if(d.l) {  
    nest ? document.layers[nest].document.layers[ident].display = "block" : document.layers[ident].display = "block";
  } else if(d.a) {  
    document.all[ident].style.display = "block";
  } else if(d.g && !d.a) {
    warstwa =document.getElementById(ident);
    warstwa.style.display = "block";
 }
}

// Ukryj blok z zwolnieniem miejsca'ident'    
function hidedisplay(ident,nest) {
 if(d.l) {  
    nest ? document.layers[nest].document.layers[ident].display = "none" : document.layers[ident].display = "none";
  } else if(d.a) {
    document.all[ident].style.display = "none";
  } else if(d.g && !d.a) {
    warstwa=document.getElementById(ident)
    warstwa.style.display = "none";
  }
}

// Ukryj blok 'ident'    
function hide(ident,nest) {
 if(d.l) {  
    nest ? document.layers[nest].document.layers[ident].visibility = "hide" : document.layers[ident].visibility = "hide";
  } else if(d.a) {
    document.all[ident].style.visibility = "hidden";
  } else if(d.g && !d.a) {
    warstwa=document.getElementById(ident)
    warstwa.style.visibility = "hidden";
  }
}

//Zmien zawartosc bloku 'ident' 
function writeTo(ident, tekst, nest) {
 if(d.l) {
    if(nest) {
      document.layers[nest].document.layers[ident].document.open();
     document.layers[nest].document.layers[ident].document.write(tekst);
     document.layers[nest].document.layers[ident].document.close();
    } else {
      document.layers[ident].document.open();
      document.layers[ident].document.write(tekst);
      document.layers[ident].document.close();    
    }
  } else if(d.a) {
    document.all[ident].innerHTML = tekst;
 } else if(d.g && !d.a) {
    warstwa=document.getElementById(ident)
    warstwa.innerHTML = tekst;
  }
}

// poprawnosc pol formularzy
function sprawdzformularz(arkusz){
        for ( var i = 0; i< arkusz.elements.length; i++) {
                if ( arkusz.elements[i].value == ""){
                                   alert ("Wypełnij pole");
                                    return false;}
                                }
																return true;
}